The synthesis of S,N-acetals of formyldiphenylphosphine oxide 2 is described. The stable lithiated anions of these acetals were applied in a Horner-Wittig reaction with several structural types of aldehydes. The resulting S,N-ketene acetals 1 were obtained in excellent yields. Ketones and pivaldehyde did not react with the stericallyhindered phosphine oxide anions. S,N-ketene acetals 1 were found
S,S-Dimethyl dithiocarbonate: A novel carbonyl dication synthon in the synthesis of ketones
作者:Chiar-Dy Chen、Jui-Wen Huang、Man-kit Leung、Huei-hsu Li
DOI:10.1016/s0040-4020(98)00544-4
日期:1998.7
We report herein the use of DMDTC as an effective carbonyl dication equivalent in ketone synthesis. According to our strategy, we also successfully devised a synthetic pathway for S-methyl (trimethylsilyl)thioacetate which may be a potentially useful synthetic reagent in organic synthesis.